﻿/*******************************************************************************
 * You may amend and distribute as you like, but don't remove this header!
 *
 * EPPlus provides server-side generation of Excel 2007/2010 spreadsheets.
 * See https://github.com/JanKallman/EPPlus for details.
 *
 * Copyright (C) 2011  Jan Källman
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.

 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  
 * See the GNU Lesser General Public License for more details.
 *
 * The GNU Lesser General Public License can be viewed at http://www.opensource.org/licenses/lgpl-license.php
 * If you unfamiliar with this license or have questions about it, here is an http://www.gnu.org/licenses/gpl-faq.html
 *
 * All code and executables are provided "as is" with no warranty either express or implied. 
 * The author accepts no liability for any damage or loss of business that this product may cause.
 *
 * Code change notes:
 * 
 * Author							Change						Date
 * ******************************************************************************
 * Eyal Seagull        Added       		  2012-04-03
 *******************************************************************************/
using OfficeOpenXml.Utils;
using System;
using System.Drawing;
using System.Globalization;
using System.Linq;
using System.Text.RegularExpressions;
using System.Xml;

namespace OfficeOpenXml.ConditionalFormatting
{
    /// <summary>
    /// Conditional formatting helper
    /// </summary>
    internal static class ExcelConditionalFormattingHelper
    {
        /// <summary>
        /// Check and fix an address (string address)
        /// </summary>
        /// <param name="address"></param>
        /// <returns></returns>
        public static string CheckAndFixRangeAddress(
          string address)
        {
            if (address.Contains(','))
            {
                throw new FormatException(
                  ExcelConditionalFormattingConstants.Errors.CommaSeparatedAddresses);
            }

            address = ConvertUtil._invariantTextInfo.ToUpper(address);

            if (Regex.IsMatch(address, @"[A-Z]+:[A-Z]+"))
            {
                address = AddressUtility.ParseEntireColumnSelections(address);
            }

            return address;
        }

        /// <summary>
        /// Convert a color code to Color Object
        /// </summary>
        /// <param name="colorCode">Color Code (Ex. "#FFB43C53" or "FFB43C53")</param>
        /// <returns></returns>
        public static Color ConvertFromColorCode(
          string colorCode)
        {
            try
            {
                return Color.FromArgb(Int32.Parse(colorCode.Replace("#", ""), NumberStyles.HexNumber));
            }
            catch
            {
                // Assume white is the default color (instead of giving an error)
                return Color.White;
            }
        }

        /// <summary>
        /// 
        /// </summary>
        /// <param name="node"></param>
        /// <param name="attribute"></param>
        /// <returns></returns>
        public static string GetAttributeString(
          XmlNode node,
          string attribute)
        {
            try
            {
                var value = node.Attributes[attribute].Value;
                return (value == null) ? string.Empty : value;
            }
            catch
            {
                return string.Empty;
            }
        }

        /// <summary>
        /// 
        /// </summary>
        /// <param name="node"></param>
        /// <param name="attribute"></param>
        /// <returns></returns>
        public static int GetAttributeInt(
          XmlNode node,
          string attribute)
        {
            try
            {
                var value = node.Attributes[attribute].Value;
                return int.Parse(value, NumberStyles.Integer, CultureInfo.InvariantCulture);
            }
            catch
            {
                return int.MinValue;
            }
        }

        /// <summary>
        /// 
        /// </summary>
        /// <param name="node"></param>
        /// <param name="attribute"></param>
        /// <returns></returns>
        public static int? GetAttributeIntNullable(
          XmlNode node,
          string attribute)
        {
            try
            {
                if (node.Attributes[attribute] == null)
                {
                    return null;
                }
                else
                {
                    var value = node.Attributes[attribute].Value;
                    return int.Parse(value, NumberStyles.Integer, CultureInfo.InvariantCulture);
                }
            }
            catch
            {
                return null;
            }
        }

        /// <summary>
        /// 
        /// </summary>
        /// <param name="node"></param>
        /// <param name="attribute"></param>
        /// <returns></returns>
        public static bool GetAttributeBool(
          XmlNode node,
          string attribute)
        {
            try
            {
                var value = node.Attributes[attribute].Value;
                return (value == "1" || value == "-1" || value.Equals("TRUE", StringComparison.OrdinalIgnoreCase));
            }
            catch
            {
                return false;
            }
        }

        /// <summary>
        /// 
        /// </summary>
        /// <param name="node"></param>
        /// <param name="attribute"></param>
        /// <returns></returns>
        public static bool? GetAttributeBoolNullable(
          XmlNode node,
          string attribute)
        {
            try
            {
                if (node.Attributes[attribute] == null)
                {
                    return null;
                }
                else
                {
                    var value = node.Attributes[attribute].Value;
                    return (value == "1" || value == "-1" || value.Equals("TRUE", StringComparison.OrdinalIgnoreCase));
                }
            }
            catch
            {
                return null;
            }
        }

        /// <summary>
        /// 
        /// </summary>
        /// <param name="node"></param>
        /// <param name="attribute"></param>
        /// <returns></returns>
        public static double GetAttributeDouble(
          XmlNode node,
          string attribute)
        {
            try
            {
                var value = node.Attributes[attribute].Value;
                return double.Parse(value, NumberStyles.Number, CultureInfo.InvariantCulture);
            }
            catch
            {
                return double.NaN;
            }
        }

        /// <summary>
        /// 
        /// </summary>
        /// <param name="node"></param>
        /// <param name="attribute"></param>
        /// <returns></returns>
        public static decimal GetAttributeDecimal(
          XmlNode node,
          string attribute)
        {
            try
            {
                var value = node.Attributes[attribute].Value;
                return decimal.Parse(value, NumberStyles.Any, CultureInfo.InvariantCulture);
            }
            catch
            {
                return decimal.MinValue;
            }
        }

        /// <summary>
        /// Encode to XML (special characteres: &apos; &quot; &gt; &lt; &amp;)
        /// </summary>
        /// <param name="s"></param>
        /// <returns></returns>
        public static string EncodeXML(
          this string s)
        {
            return s.Replace("&", "&amp;").Replace("<", "&lt;").Replace(">", "&gt;").Replace("\"", "&quot;").Replace("'", "&apos;");
        }

        /// <summary>
        /// Decode from XML (special characteres: &apos; &quot; &gt; &lt; &amp;)
        /// </summary>
        /// <param name="s"></param>
        /// <returns></returns>
        public static string DecodeXML(
          this string s)
        {
            return s.Replace("'", "&apos;").Replace("\"", "&quot;").Replace(">", "&gt;").Replace("<", "&lt;").Replace("&", "&amp;");
        }
    }
}